-
I have need of a directional antenna for a 30 foot path within the house.
(the microwave oven wipes out the signal).

Yikes! I have never seen that. I would be concerned about leakage.
Sometimes I have torn into things and found stupid stuff like paint over
grounding surfaces or rust in the compartment. There is a critical ground
around the probe entrance.

My microwave oven is in the far corner of the house and I run 100 watts on
VHF and 600 on HF at times and never had trouble. I never tried the laptop
in the kitchen for fear of spillage. The Linksys is essentially on the
floor to keep people in the park next door from ripping up my bandwidth.
(although sometimes I would prefer geeks hanging out there to chase the rest
out) No coverage problems at all. I do have an HT that gets "some"
interference when I set it on top of the oven.

Knight wrote:
Guys! I've been selling these Biquads for a long time now and
everyone absolutely
loves them.
Check em out here... http://www.biquadantenna.com
Sold 30 just this month alone, and get emails all the time from
clients
on how good their performance is.
If it doesn't work, you get your money back! (minus shipping of
course)

Thanks for looking!
Pete

Which picture depicts the omnidirectional one?

Regards,
JS

On Sat, 22 Nov 2008 12:08:54 -0800 (PST), JIMMIE
wrote:

On Nov 21, 8:47*pm, JIMMIE wrote:
I recently built a Franklin antenna for 2.4Ghz.
I highly reccommend it. Google WiFi and franklin antenna.
Jimmie

Also look up AMOS antenna. They are easy to make and work well
Jimmie

AMOS, Franklin, Sector, et al:
http://pe2er.nl/wifisector/
http://yu1aw.ba-karlsruhe.de/vhf_ant.htm
http://www.qsl.net/yu1aw/vhf_ant.htm
http://www.brest-wireless.net/gallery/AntenneAmos
http://www.brest-wireless.net/wiki/materiel:amos
http://www.brest-wireless.net/forum/viewtopic.php?id=75&p=2

NEC2 model:
http://802.11junk.com/jeffl/antennas/AMOS-7/
http://802.11junk.com/jeffl/antennas/AMOS-5/ (not optimized yet)

AMOS design:
http://www.qsl.net/yu1aw/amos_article.pdf

Inverted AMOS:
http://www.qsl.net/yu1aw/invertamos.pdf


--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

"JB" wrote in message
...
-
I have need of a directional antenna for a 30 foot path within the house.
(the microwave oven wipes out the signal).

Yikes! I have never seen that. I would be concerned about leakage.
Sometimes I have torn into things and found stupid stuff like paint over
grounding surfaces or rust in the compartment. There is a critical ground
around the probe entrance.


The laptop computer is downstairs about 10 feet from the microwave, and the
wireless router is upstairs about 30 feet away with a desktop(and the path
goes through three walls and the floor. The microwave doesn't wipe out the
laptop, but slows things down a bit. A directional antenna would solve the
problem. I'm not trying to increase range at all.

On Sun, 23 Nov 2008 15:32:02 -0800, Jeff Liebermann
wrote:

NEC2 model:
http://802.11junk.com/jeffl/antennas/AMOS-7/
http://802.11junk.com/jeffl/antennas/AMOS-5/ (not optimized yet)

Fixed. I was feeling guilty so I ran it through the optimizer in
4NEC2. I haven't built a 5 dipole AMOS yet using these dimensions.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

On Nov 23, 7:39*pm, Jeff Liebermann wrote:
On Sun, 23 Nov 2008 15:32:02 -0800, Jeff Liebermann
wrote:

NEC2 model:
http://802.11junk.com/jeffl/antennas/AMOS-7/
http://802.11junk.com/jeffl/antennas/AMOS-5/ *(not optimized yet)

Fixed. *I was feeling guilty so I ran it through the optimizer in
4NEC2. *I haven't built a 5 dipole AMOS yet using these dimensions.

--
Jeff Liebermann * *
150 Felker St #D * *http://www.LearnByDestroying.com
Santa Cruz CA 95060http://802.11junk.com
Skype: JeffLiebermann * * AE6KS * *831-336-2558

I put one up I use with a WiFi repeater and I can see dozens of
wirless routers in my neighborhood. The antena i mounted at about
20ft on my chimney. There are about 8 or 9 with no security. If I so
chose I would never have to pay for internet service. There is another
subdivsion behind my house I havent even looked at that one yet.
Strange thing I know 3 of the people who have the open systems and
they are farly savy about these things. I wonder if they are leaving
them open on purpose.

Jimmie

Wayne wrote:

...
The laptop computer is downstairs about 10 feet from the microwave, and the
wireless router is upstairs about 30 feet away with a desktop(and the path
goes through three walls and the floor. The microwave doesn't wipe out the
laptop, but slows things down a bit. A directional antenna would solve the
problem. I'm not trying to increase range at all.



I had a cheap samsung (I think that was it) microwave, it did slow
internet ...

I now have a 1.2 KW GE ... it does not ...

However, a leakage meter did show leakage from the samsung, and barely
reads on GE I have now, and I mean I touch the microwaves case to get
that reading!

So, what is the point? Buyer beware, with lack of consumer protection,
I would check the microwave myself rather than trust others to safeguard
me ...

Regards
JS

JIMMIE wrote:

...
Strange thing I know 3 of the people who have the open systems and
they are farly savy about these things. I wonder if they are leaving
them open on purpose.

Jimmie

I do. "They" call it a "honepot" (google it), fun to mess with 'em ... :-)

Regards,
JS

"Wayne" wrote in message
...

"JB" wrote in message
...
-
I have need of a directional antenna for a 30 foot path within the
house.
(the microwave oven wipes out the signal).

Yikes! I have never seen that. I would be concerned about leakage.
Sometimes I have torn into things and found stupid stuff like paint over
grounding surfaces or rust in the compartment. There is a critical
ground
around the probe entrance.


The laptop computer is downstairs about 10 feet from the microwave, and
the
wireless router is upstairs about 30 feet away with a desktop(and the path
goes through three walls and the floor. The microwave doesn't wipe out
the
laptop, but slows things down a bit. A directional antenna would solve
the
problem. I'm not trying to increase range at all.

It would certainly be best to remove the interference. If you have 4 bars
now, 5 bars might not do away with the problem. Moving the microwave just
5' more might be enough. You may have to bite the bullet and put in some
wiring to move the router.

Some of these guys are prone to take a practical problem like yours and turn
it into a full-blown engineering problem or a swap meet for their break
through technology or even an opportunity to throw mud. One engineering
problem we faced was how to contain UHF security and housekeeping repeaters
to a high rise building and it's underground structure. The final result
was 99% coverage in the building and the parking structure, but when
security went off the property, the radios went away. Visits to other
buildings showed no coverage there either. We had to do that for both
security and so we could get co-ordinated for licensing in an urban area.
But it was a multi-million dollar system. This is free.

Placing one of those in an upstairs room is an invitation to the neighbors.
I run a combination of wired and wireless. Wired to the desktop and to a
port replicator for the laptop and wireless to a print server with several
printers in a shop area, and the AP is off unless I want to roam around or
do print jobs. There are times I have printed from the laptop, wireless in
the shop to baby-sit print jobs, but it keeps the office clear and quiet.
One of these days I will have to run a cat5 out to the shop. It is simply
faster and more secure. The end result is my router, 1 foot off the floor
with the power set to 50% to do all I need to do.

"John Smith" wrote in message
...
JIMMIE wrote:

...
Strange thing I know 3 of the people who have the open systems and
they are farly savy about these things. I wonder if they are leaving
them open on purpose.

Jimmie

I do. "They" call it a "honepot" (google it), fun to mess with 'em ...
:-)

Regards,
JS

Perhaps they want to take the blame for everyone downloading bootleg porn,
music and movies until their ISP terminates or throttles them for abuse.
Either that or they are trying to log mac addresses of those who do.